Neutron powder diffraction study of the 12 K superconductor La3Ni2B2N3-x

Q. Huang; B. C. Chakoumakos; A. Santoro; R. J. Cava; J. J. Krajewski; W. F. Peck

doi:10.1016/0921-4534(95)00041-0

Neutron powder diffraction study of the 12 K superconductor La₃Ni₂B₂N_3-x

Q. Huang, B. C. Chakoumakos, A. Santoro, R. J. Cava, J. J. Krajewski, W. F. Peck

Single Crystal Diffraction

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22 Scopus citations

Abstract

The structure of superconducting La₃Ni₂B₂N_3-x has been investigated by neutron powder diffraction methods at room temperature. The compound crystallizes with the symmetry of space group I4/mmm (No. 139) and lattice parameters a = 3.72512(5) and c = 20.5172(4) A ̊. The structure is layered and is made of (LaN) (LaN) (LaN) blocks with the rock-salt configuration alternating along the c-axis with Ni₂B₂ blocks having a fluorite-type arrangement of the atoms. The nitrogen site located on the central layer of the rock-salt block is only 90% occupied, yielding stoichiometry La₃Ni₂B₂N_2.9. Layers are connected to each other along the c-axis by LaN, BN and NiB bonds, while the connections within the layers are provided by LaN and NiNi bonds.

Original language	English
Pages (from-to)	101-105
Number of pages	5
Journal	Physica C: Superconductivity and its Applications
Volume	244
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(95)00041-0
State	Published - Mar 10 1995

Funding

The research at Oak Ridge National Laboratory and the high flux isotope reactor is supported in part by the Division of Materials Sciences, U.S. Department of Energy, under Contract No. DE-AC05-84OR21400 with Martin Marietta Energy Systems, Inc.

Funders	Funder number
Division of Materials Sciences
U.S. Department of Energy	DE-AC05-84OR21400
Oak Ridge National Laboratory

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title = "Neutron powder diffraction study of the 12 K superconductor La3Ni2B2N3-x",

abstract = "The structure of superconducting La3Ni2B2N3-x has been investigated by neutron powder diffraction methods at room temperature. The compound crystallizes with the symmetry of space group I4/mmm (No. 139) and lattice parameters a = 3.72512(5) and c = 20.5172(4) A ̊. The structure is layered and is made of (LaN) (LaN) (LaN) blocks with the rock-salt configuration alternating along the c-axis with Ni2B2 blocks having a fluorite-type arrangement of the atoms. The nitrogen site located on the central layer of the rock-salt block is only 90% occupied, yielding stoichiometry La3Ni2B2N2.9. Layers are connected to each other along the c-axis by LaN, BN and NiB bonds, while the connections within the layers are provided by LaN and NiNi bonds.",

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AU - Huang, Q.

AU - Chakoumakos, B. C.

AU - Santoro, A.

AU - Cava, R. J.

AU - Krajewski, J. J.

AU - Peck, W. F.

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N2 - The structure of superconducting La3Ni2B2N3-x has been investigated by neutron powder diffraction methods at room temperature. The compound crystallizes with the symmetry of space group I4/mmm (No. 139) and lattice parameters a = 3.72512(5) and c = 20.5172(4) A ̊. The structure is layered and is made of (LaN) (LaN) (LaN) blocks with the rock-salt configuration alternating along the c-axis with Ni2B2 blocks having a fluorite-type arrangement of the atoms. The nitrogen site located on the central layer of the rock-salt block is only 90% occupied, yielding stoichiometry La3Ni2B2N2.9. Layers are connected to each other along the c-axis by LaN, BN and NiB bonds, while the connections within the layers are provided by LaN and NiNi bonds.

AB - The structure of superconducting La3Ni2B2N3-x has been investigated by neutron powder diffraction methods at room temperature. The compound crystallizes with the symmetry of space group I4/mmm (No. 139) and lattice parameters a = 3.72512(5) and c = 20.5172(4) A ̊. The structure is layered and is made of (LaN) (LaN) (LaN) blocks with the rock-salt configuration alternating along the c-axis with Ni2B2 blocks having a fluorite-type arrangement of the atoms. The nitrogen site located on the central layer of the rock-salt block is only 90% occupied, yielding stoichiometry La3Ni2B2N2.9. Layers are connected to each other along the c-axis by LaN, BN and NiB bonds, while the connections within the layers are provided by LaN and NiNi bonds.

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Neutron powder diffraction study of the 12 K superconductor La₃Ni₂B₂N_3-x

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